Honestly, if you’d told a Doctor Who fan back in 2018 that a probationary police officer from Sheffield would end up breaking records, they might’ve blinked twice. But that’s exactly what happened with Yasmin Khan. Usually just called Yaz, she didn't just walk into the TARDIS; she basically moved in and refused to leave. By the time Mandip Gill hung up the police hat in 2022, she had become the longest-running companion in the modern era of the show.
That’s a big deal. We’re talking more screen time than Rose Tyler or Amy Pond. Yet, her legacy is kinda complicated. Some fans think she’s the heart of the Thirteenth Doctor’s era, while others feel like she was pushed to the backburner for way too long.
The Sheffield PC Who Wanted More
When we first meet Yaz in The Woman Who Fell to Earth, she’s frustrated. She is stuck doing low-level police work—parking disputes, mostly—and she is literally begging her commander for something more challenging. Enter a falling alien and a blonde woman in a trench coat.
Yaz wasn’t like the companions who came before her. She wasn’t a bored shop girl or a nanny. She had training. She was a PC. This meant she brought a level of logic and crisis management to the team that felt fresh. In the early days of "Team TARDIS," alongside Ryan Sinclair and Graham O’Brien, she often acted as the bridge between the Doctor’s chaos and the group’s humanity.
But here’s the thing: in those first two seasons (Series 11 and 12), the show struggled to find her "voice." Because there were three companions, the writers often gave the emotional heavy lifting to Graham and Ryan. Their grandfather-grandson dynamic was the engine of the plot, which meant Yaz often ended up just... investigating things. She was the one "checking the perimeter" while the boys had the big heart-to-hearts.
The Turning Point in the Punjab
Everything changed with Demons of the Punjab. If you haven't seen it, it’s arguably one of the best historical episodes in the show's 60-year history. Yaz takes the lead, traveling back to 1947 during the Partition of India to meet her grandmother, Umbreen.
It was the first time we saw Yaz’s vulnerability. Seeing her realize that her "Nan" had a whole life, a whole first love, and a world of pain that she never talked about was powerful. It grounded her character in a way the "cop stuff" hadn't quite managed. It also highlighted her heritage as a British-Pakistani woman, a perspective that had been missing from the TARDIS for far too long.
The Thasmin Phenomenon: A Slow Burn or a Missed Opportunity?
You can't talk about yasmin khan doctor who without talking about "Thasmin." That’s the ship name for Yaz and the Thirteenth Doctor (Jodie Whittaker).
For years, it was just a fan theory. People noticed the way Yaz looked at the Doctor. It wasn't just admiration; it was something deeper. There’s a scene in Arachnids in the UK where Yaz’s mom asks if they’re "seeing each other," and the awkward silence that follows launched a thousand fanfics.
But the show took its sweet time acknowledging it. It wasn't until Eve of the Daleks in 2022 that the feelings were actually said out loud. Dan Lewis (John Bishop) finally called it out, telling Yaz what everyone else already knew: she was in love with the Doctor.
Why the Ending Still Stings
The romance was "confirmed" in Legend of the Sea Devils, where the Doctor admitted she reciprocated the feelings but couldn't act on them because "nothing lasts forever."
A lot of fans were gutted. It felt like the show finally opened a door only to slam it shut immediately. There was no kiss. No "official" relationship. Just a lot of pining and then a heartbreaking goodbye on the edge of a TARDIS door with an ice cream.
Some argue this was a "bury your gays" trope or at least a very timid way of handling the first queer lead romance in the show. Others think the unrequited, tragic nature of it made it more "Doctor-y." Regardless of where you stand, it’s the defining arc of her final year.
The Mental Health Story No One Saw Coming
One of the most surprising and grounded things about Yaz was the reveal of her past in the episode Can You Hear Me?. We learned that as a teenager, Yaz had struggled so deeply with her mental health that she actually ran away from home, intending to end her life.
She was saved by a police officer named Anita. This wasn't just a random backstory; it explained why Yaz became a cop. She wanted to be that person for someone else.
This level of darkness was rare for a Doctor Who companion, but it made her "addiction" to the TARDIS make sense. For Yaz, the Doctor wasn't just a travel guide; the Doctor was the person who showed her that the universe was too big and too beautiful to give up on.
Life After the TARDIS: Big Finish and Beyond
Yaz’s story didn't actually end when she stepped out of the TARDIS in The Power of the Doctor. Because the fans loved the duo so much, Jodie Whittaker and Mandip Gill actually returned to their roles in 2025 for a series of audio dramas with Big Finish Productions.
These stories, like The Return of the Doctor, finally give the pair the room to breathe that the TV show didn't always have. We get to see them as a duo—no Graham, no Ryan, no Dan—just the Doctor and Yaz. It’s here that their relationship is being explored with a bit more grit. They argue more. They challenge each other. It feels like the "missing" development fans wanted during the TV run.
What Yaz Left Behind
So, what’s the takeaway? Yaz changed the "blueprint" for a companion.
- She stayed the longest. She proved a companion could survive multiple cast turnovers and still feel relevant.
- She represented a shift in diversity. Her background and faith weren't just "flavor text"; they were central to episodes like Demons of the Punjab.
- She was the "First." She was the first companion to have an explicit romantic arc with a female Doctor, even if it was handled with varying degrees of success.
If you’re looking to revisit her best moments, skip the filler. Watch Demons of the Punjab, Can You Hear Me?, and then jump straight to Flux and the 2022 specials. You’ll see a character who started as a shy PC and ended as a woman who could basically fly the TARDIS herself.
The best way to appreciate Yaz now is to check out the Big Finish audio range, specifically The Thirteenth Doctor Adventures. It fills in the gaps of her "unspoken" feelings and shows exactly why the Doctor considered her the "best person" she ever knew.
Actionable Next Steps: If you want to dive deeper into the Yaz era, start by watching Demons of the Punjab (Series 11, Episode 6) to understand her roots. After that, look up the Big Finish audio Vampire Weekend to hear how her relationship with the Doctor has evolved post-TV. It’s the closest we’ll get to a "Series 14" for this version of the TARDIS team.
